SE 360 Advances in Software Development Object Oriented Development in Java. Polymorphism. Dr. Senem Kumova Metin

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "SE 360 Advances in Software Development Object Oriented Development in Java. Polymorphism. Dr. Senem Kumova Metin"

Transcription

1 SE 360 Advances in Software Development Object Oriented Development in Java Polymorphism Dr. Senem Kumova Metin Modified lecture notes of Dr. Hüseyin Akcan

2 Inheritance Object oriented programming languages allow classes to inherit commonly used state and behavior from other classes CODE REUSE How to factor out the commonalities of various classes?? Find out IS-A RELATIONSHIPS A mammal is a vertebrate A dog is a mammal Superclass (parent) contains all the attributes and behaviors that are common to classes that inherit from it (subclasses)

3 Inheritance : Classification of Vertebrates Arrows represent is-a relationship

4 Inheritance: A Simple Example

5 Abstract Classes

6 Polymorphism Dictionary Definition of Polymorphism: The quality of being able to assume different forms In the context of programming: A program part is polymorphic if it can be used for objects of several types

7 Polymorphism Polymorphism is tightly coupled to inheritance In inheritance hierarchy, all subclasses inherit the interfaces from their superclass. However each subclass is a separate entitiy, each might require a different response to same message!! Polymorphism supports different responses

8 Polymorphism : Example public abstract class Shape{ protected double area; public abstract double getarea();} public class Circle extends Shape{ double radius; public Circle(double r) { radius=r;} public double getarea() { area=3.14*radius*radius; return (area) ;} }

9 Example Paint program Assume you have to write a print program to display the following: circle, rectangle, square You create a class for each of them, and implement a print() method Also you want to keep the runtime objects in a single array, and whenever a refresh is needed, call the print() method of each object in this array How would you do it?

10 class Shape { Example 1. public void print() { System.out.println("Shape::print"); } } class Triangle extends Shape { public void print(){system.out.println("triangle::print"); } } class Circle extends Shape { public void print(){system.out.println("circle::print"); } } public class Example1 { public static void show(shape s){ s.print(); } public static void main(string[] args) { Triangle t=new Triangle(); Circle c=new Circle(); show(t); show(c); ; } }

11 Example 1. What happens if print() in class Shape is removed? class Shape {} class Triangle extends Shape { public void print(){system.out.println("triangle::print"); } } class Circle extends Shape { public void print(){system.out.println("circle::print"); } } public class Example1 { public static void show(shape s){ s.print(); } public static void main(string[] args) { Triangle t=new Triangle(); Circle c=new Circle(); show(t); show(c); ; } }

12 Example 1. What happens if Shape class is an abstract class? abstract class Shape { public abstract void print();} class Triangle extends Shape { public void print(){ System.out.println("Triangle::print"); } } class Circle extends Shape { public void print(){ System.out.println("Circle::print"); } } public class Example1 { } public static void show(shape s){ s.print(); } public static void main(string[] args) { Triangle t=new Triangle(); Circle c=new Circle(); show(t); show(c); }

13 class Shape { Example 2. public void print() { System.out.println("Shape::print"); } } class Triangle extends Shape { public void print(){system.out.println("triangle::print"); } } class Circle extends Shape { public void print(){system.out.println("circle::print"); } } public class Example2 { public static void show(shape s){ s.print(); } public static void main(string[] args) { } Shape s; s= new Shape(); System.out.println("I am a " +s); show(s); s= new Triangle(); System.out.println("I am a " +s); show(s); s= new Circle(); System.out.println("I am a " +s); show(s); }

14 Example 3. class Shape { public void print() { System.out.println("Shape::print"); } } class Triangle extends Shape { public void print(){ System.out.println("Triangle::print"); } } class Circle extends Shape { public void print(){ System.out.println("Circle::print"); } } public class Example3 { public static void show(shape[] s){ for (int i=0; i<s.length; i++) { System.out.println("I am a" +s); s[i].print(); } } public static void main(string[] args) { Shape [] sarray= new Shape[2]; sarray[0]= new Triangle(); sarray[1]= new Circle(); show(sarray); }

15 Method binding Method binding means connecting a method call to the method body Static binding C/C++ Dynamic binding C++/Java/Python Also called polymorphism, late-binding, runtime binding

16 Method binding (2) Java uses dynamic binding for all method calls Except final (private) and static methods Has a slight performance penalty compared to static binding

17 Stages of Binding in Java 1. Compiler looks at the declared type of the object and the method name 2. Compiler uses overload resolution policy to determine candidates 3. If the method is private, final or a constructor then static binding is used. 4. When program uses dynamic binding to call a method, then the virtual machine must call the version of the method that is appropriate for the actual type of the object

18 Dynamic Binding in Java 1. Virtual machine fetches the method table for the actual type of the object 2. Virtual machine looks up the defining class for the method signature 3. Virtual machine calls the method

19 Advantages Lets you express your design by using the base class and its methods Later you can extend the design as much as you like, add new objects etc. As long as they use the base class methods, they work with methods that accept base class type You can extend your programs without modifying existing code. Assume you add an Executive class later The existing e.getdescription() calls Executive.getDescription method automatically without needing to recompile the existing code

20 Advantages(2)

21 Design decisions In order to use the advantages of polymorphism write methods that communicate with the base class directly Lets you extend the design without changing the interface of the base class, or the methods Extend your design by inheriting new types from the base class The base class methods, and methods that communicate with the base class do not change

22 Base class methods In polymorphism, base class methods are for expressing design They should not be called in a proper design They should redirect the call to the appropriate derived class You can also define base class as abstract class!

23 Downcasting Converting the base class type to the original type Upcasting is always safe A triangle is a shape How about downcasting?

24 Downcasting(2) In C++ you use RTTI to find the original type dynamic_cast<...> In Java each cast is safe, so downcasting is also safe Otherwise you get ClassCastException

25 Example. Downcasting Try to call a subclass method which is not a inherited by a superclass type reference to an object of subclass!! class Shape1 { public void A() { System.out.println("Shape1::A()"); } } class Triangle1 extends Shape1 { public void A() { System.out.println("Triangle1::A()"); } public void B() { System.out.println("Triangle1::B()"); } } public class Downcast { public static void main(string[] args) { Shape1[] sarray= new Shape1[2]; sarray[0]= new Triangle1(); sarray[1]= new Shape1(); sarray[0].a(); //sarray[0].b(); // NOT VALID Every shape is not a triangle ((Triangle1)sArray[0]).B(); } }

Inheritance, overloading and overriding

Inheritance, overloading and overriding Inheritance, overloading and overriding Recall with inheritance the behavior and data associated with the child classes are always an extension of the behavior and data associated with the parent class

More information

CSE 303 Concepts and Tools for Software Development. Magdalena Balazinska Winter 2010 Lecture 19 Inheritance (virtual functions and abstract classes)

CSE 303 Concepts and Tools for Software Development. Magdalena Balazinska Winter 2010 Lecture 19 Inheritance (virtual functions and abstract classes) CSE 303 Concepts and Tools for Software Development Magdalena Balazinska Winter 2010 Lecture 19 Inheritance (virtual functions and abstract classes) Where We Are We have already covered the introduction

More information

History OOP languages Year Language 1967 Simula-67 1983 Smalltalk

History OOP languages Year Language 1967 Simula-67 1983 Smalltalk History OOP languages Intro 1 Year Language reported dates vary for some languages... design Vs delievered 1957 Fortran High level programming language 1958 Lisp 1959 Cobol 1960 Algol Structured Programming

More information

Part I. Multiple Choice Questions (2 points each):

Part I. Multiple Choice Questions (2 points each): Part I. Multiple Choice Questions (2 points each): 1. Which of the following is NOT a key component of object oriented programming? (a) Inheritance (b) Encapsulation (c) Polymorphism (d) Parallelism ******

More information

Agenda. What is and Why Polymorphism? Examples of Polymorphism in Java programs 3 forms of Polymorphism

Agenda. What is and Why Polymorphism? Examples of Polymorphism in Java programs 3 forms of Polymorphism Polymorphism 1 Agenda What is and Why Polymorphism? Examples of Polymorphism in Java programs 3 forms of Polymorphism 2 What is & Why Polymorphism? 3 What is Polymorphism? Generally, polymorphism refers

More information

Object-Oriented Programming: Polymorphism

Object-Oriented Programming: Polymorphism 1 10 Object-Oriented Programming: Polymorphism 10.3 Demonstrating Polymorphic Behavior 10.4 Abstract Classes and Methods 10.5 Case Study: Payroll System Using Polymorphism 10.6 final Methods and Classes

More information

CSCI 253. Object Oriented Programming (OOP) Overview. George Blankenship 1. Object Oriented Design: Java Review OOP George Blankenship.

CSCI 253. Object Oriented Programming (OOP) Overview. George Blankenship 1. Object Oriented Design: Java Review OOP George Blankenship. CSCI 253 Object Oriented Design: Java Review OOP George Blankenship George Blankenship 1 Object Oriented Programming (OOP) OO Principles Abstraction Encapsulation Abstract Data Type (ADT) Implementation

More information

Object Oriented Software Design

Object Oriented Software Design Object Oriented Software Design Inner classes, RTTI, Tree implementation Giuseppe Lipari http://retis.sssup.it/~lipari Scuola Superiore Sant Anna Pisa October 29, 2010 G. Lipari (Scuola Superiore Sant

More information

Java (12 Weeks) Introduction to Java Programming Language

Java (12 Weeks) Introduction to Java Programming Language Java (12 Weeks) Topic Lecture No. Introduction to Java Programming Language 1 An Introduction to Java o Java as a Programming Platform, The Java "White Paper" Buzzwords, Java and the Internet, A Short

More information

Introducing Variance into the Java Programming Language DRAFT

Introducing Variance into the Java Programming Language DRAFT Introducing Variance into the Java Programming Language A Quick Tutorial DRAFT Christian Plesner Hansen Peter von der Ahé Erik Ernst Mads Torgersen Gilad Bracha June 3, 2003 1 Introduction Notice: This

More information

Java Interview Questions and Answers

Java Interview Questions and Answers 1. What is the most important feature of Java? Java is a platform independent language. 2. What do you mean by platform independence? Platform independence means that we can write and compile the java

More information

Chapter 1 Fundamentals of Java Programming

Chapter 1 Fundamentals of Java Programming Chapter 1 Fundamentals of Java Programming Computers and Computer Programming Writing and Executing a Java Program Elements of a Java Program Features of Java Accessing the Classes and Class Members The

More information

Java Application Developer Certificate Program Competencies

Java Application Developer Certificate Program Competencies Java Application Developer Certificate Program Competencies After completing the following units, you will be able to: Basic Programming Logic Explain the steps involved in the program development cycle

More information

Avancerad programmering i C++ 1

Avancerad programmering i C++ 1 Polymorphism Polymorphism and virtual Polymorphism - many forms In C++, polymorphism is implemented through virtual. Virtual (and so, of course, polymorphism) have a meaning only in the context of inheritance.

More information

Polymorphism. Why use polymorphism Upcast revisited (and downcast) Static and dynamic type Dynamic binding. Polymorphism.

Polymorphism. Why use polymorphism Upcast revisited (and downcast) Static and dynamic type Dynamic binding. Polymorphism. Why use polymorphism Upcast revisited (and downcast) Static and dynamic type Dynamic binding Polymorphism Polymorphism A polymorphic field (the state design pattern) Abstract classes The composite design

More information

LAB4 Making Classes and Objects

LAB4 Making Classes and Objects LAB4 Making Classes and Objects Objective The main objective of this lab is class creation, how its constructer creation, object creation and instantiation of objects. We will use the definition pane to

More information

243 Week 3 Lecture - Interfaces

243 Week 3 Lecture - Interfaces One problem, many solutions 243 Week 3 Lecture - Interfaces Suppose we want to implement a set of classes to represent various shapes such as circles and rectangles. We want to be able to calculate the

More information

CS-XXX: Graduate Programming Languages. Lecture 25 Multiple Inheritance and Interfaces. Dan Grossman 2012

CS-XXX: Graduate Programming Languages. Lecture 25 Multiple Inheritance and Interfaces. Dan Grossman 2012 CS-XXX: Graduate Programming Languages Lecture 25 Multiple Inheritance and Interfaces Dan Grossman 2012 Multiple Inheritance Why not allow class C extends C1,C2,...{...} (and C C1 and C C2)? What everyone

More information

Agile Software Development

Agile Software Development Agile Software Development Lecturer: Raman Ramsin Lecture 13 Refactoring Part 3 1 Dealing with Generalization: Pull Up Constructor Body Pull Up Constructor Body You have constructors on subclasses with

More information

Object-Oriented Programming Lecture 2: Classes and Objects

Object-Oriented Programming Lecture 2: Classes and Objects Object-Oriented Programming Lecture 2: Classes and Objects Dr. Lê H!ng Ph"#ng -- Department of Mathematics, Mechanics and Informatics, VNUH July 2012 1 Content Class Object More on class Enum types Package

More information

AP Computer Science Java Subset

AP Computer Science Java Subset APPENDIX A AP Computer Science Java Subset The AP Java subset is intended to outline the features of Java that may appear on the AP Computer Science A Exam. The AP Java subset is NOT intended as an overall

More information

CS 111 Classes I 1. Software Organization View to this point:

CS 111 Classes I 1. Software Organization View to this point: CS 111 Classes I 1 Software Organization View to this point: Data Objects and primitive types Primitive types operators (+, /,,*, %). int, float, double, char, boolean Memory location holds the data Objects

More information

AP Computer Science A - Syllabus Overview of AP Computer Science A Computer Facilities

AP Computer Science A - Syllabus Overview of AP Computer Science A Computer Facilities AP Computer Science A - Syllabus Overview of AP Computer Science A Computer Facilities The classroom is set up like a traditional classroom on the left side of the room. This is where I will conduct my

More information

Computing Concepts with Java Essentials

Computing Concepts with Java Essentials 2008 AGI-Information Management Consultants May be used for personal purporses only or by libraries associated to dandelon.com network. Computing Concepts with Java Essentials 3rd Edition Cay Horstmann

More information

Java CPD (I) Frans Coenen Department of Computer Science

Java CPD (I) Frans Coenen Department of Computer Science Java CPD (I) Frans Coenen Department of Computer Science Content Session 1, 12:45-14:30 (First Java Programme, Inheritance, Arithmetic) Session 2, 14:45-16:45 (Input and Programme Constructs) Materials

More information

Preet raj Core Java and Databases CS4PR. Time Allotted: 3 Hours. Final Exam: Total Possible Points 75

Preet raj Core Java and Databases CS4PR. Time Allotted: 3 Hours. Final Exam: Total Possible Points 75 Preet raj Core Java and Databases CS4PR Time Allotted: 3 Hours Final Exam: Total Possible Points 75 Q1. What is difference between overloading and overriding? 10 points a) In overloading, there is a relationship

More information

Fundamentals of Java Programming

Fundamentals of Java Programming Fundamentals of Java Programming This document is exclusive property of Cisco Systems, Inc. Permission is granted to print and copy this document for non-commercial distribution and exclusive use by instructors

More information

Advanced Data Structures

Advanced Data Structures C++ Advanced Data Structures Chapter 8: Advanced C++ Topics Zhijiang Dong Dept. of Computer Science Middle Tennessee State University Chapter 8: Advanced C++ Topics C++ 1 C++ Syntax of 2 Chapter 8: Advanced

More information

Polymorphism. Problems with switch statement. Solution - use virtual functions (polymorphism) Polymorphism

Polymorphism. Problems with switch statement. Solution - use virtual functions (polymorphism) Polymorphism Polymorphism Problems with switch statement Programmer may forget to test all possible cases in a switch. Tracking this down can be time consuming and error prone Solution - use virtual functions (polymorphism)

More information

Habanero Extreme Scale Software Research Project

Habanero Extreme Scale Software Research Project Habanero Extreme Scale Software Research Project Comp215: Java Method Dispatch Zoran Budimlić (Rice University) Always remember that you are absolutely unique. Just like everyone else. - Margaret Mead

More information

AP Computer Science Curriculum Module: An Introduction to Polymorphism in Java

AP Computer Science Curriculum Module: An Introduction to Polymorphism in Java AP Computer Science Curriculum Module: An Introduction to Polymorphism in Java Dan Umbarger AP Computer Science Teacher Dallas, Texas 2008 The College Board. All rights reserved. College Board, Advanced

More information

Java 6 'th. Concepts INTERNATIONAL STUDENT VERSION. edition

Java 6 'th. Concepts INTERNATIONAL STUDENT VERSION. edition Java 6 'th edition Concepts INTERNATIONAL STUDENT VERSION CONTENTS PREFACE vii SPECIAL FEATURES xxviii chapter i INTRODUCTION 1 1.1 What Is Programming? 2 J.2 The Anatomy of a Computer 3 1.3 Translating

More information

INTRODUCTION TO COMPUTER PROGRAMMING. Richard Pierse. Class 7: Object-Oriented Programming. Introduction

INTRODUCTION TO COMPUTER PROGRAMMING. Richard Pierse. Class 7: Object-Oriented Programming. Introduction INTRODUCTION TO COMPUTER PROGRAMMING Richard Pierse Class 7: Object-Oriented Programming Introduction One of the key issues in programming is the reusability of code. Suppose that you have written a program

More information

CompuScholar, Inc. Alignment to Utah's Computer Programming II Standards

CompuScholar, Inc. Alignment to Utah's Computer Programming II Standards CompuScholar, Inc. Alignment to Utah's Computer Programming II Standards Course Title: TeenCoder: Java Programming Course ISBN: 978 0 9887070 2 3 Course Year: 2015 Note: Citation(s) listed may represent

More information

Compiling Object Oriented Languages. What is an Object-Oriented Programming Language? Implementation: Dynamic Binding

Compiling Object Oriented Languages. What is an Object-Oriented Programming Language? Implementation: Dynamic Binding Compiling Object Oriented Languages What is an Object-Oriented Programming Language? Last time Dynamic compilation Today Introduction to compiling object oriented languages What are the issues? Objects

More information

using java 1.5 generics

using java 1.5 generics Weiss_3e_04 Page 131 Wednesday, January 12, 2005 3:05 PM 4.7 implementing generic components using java 1.5 generics 131 4.7 implementing generic components using java 1.5 generics We have already seen

More information

The Interface Concept

The Interface Concept Multiple inheritance Interfaces Four often used Java interfaces Iterator Cloneable Serializable Comparable The Interface Concept OOP: The Interface Concept 1 Multiple Inheritance, Example Person name()

More information

Free Java textbook available online. Introduction to the Java programming language. Compilation. A simple java program

Free Java textbook available online. Introduction to the Java programming language. Compilation. A simple java program Free Java textbook available online "Thinking in Java" by Bruce Eckel, 4th edition, 2006, ISBN 0131872486, Pearson Education Introduction to the Java programming language CS 4354 Summer II 2015 The third

More information

Block IQ. Marko Boon (marko@win.tue.nl) Jacques Resing (resing@win.tue.nl)

Block IQ. Marko Boon (marko@win.tue.nl) Jacques Resing (resing@win.tue.nl) Block IQ Marko Boon (marko@win.tue.nl) Jacques Resing (resing@win.tue.nl) Part II: Object Oriented Programming 2/266 1. Objects and Classes 2. Class Inheritance and Interfaces 3. Some Predefined Java Classes

More information

Free Java textbook available online. Introduction to the Java programming language. Compilation. A simple java program

Free Java textbook available online. Introduction to the Java programming language. Compilation. A simple java program Free Java textbook available online "Thinking in Java" by Bruce Eckel, 4th edition, 2006, ISBN 0131872486, Pearson Education Introduction to the Java programming language CS 4354 Summer II 2014 Jill Seaman

More information

Cohort: BCA/07B/PT - BCA/06/PT - BCNS/06/FT - BCNS/05/FT - BIS/06/FT - BIS/05/FT - BSE/05/FT - BSE/04/PT-BSE/06/FT

Cohort: BCA/07B/PT - BCA/06/PT - BCNS/06/FT - BCNS/05/FT - BIS/06/FT - BIS/05/FT - BSE/05/FT - BSE/04/PT-BSE/06/FT BSc (Hons) in Computer Applications, BSc (Hons) Computer Science with Network Security, BSc (Hons) Business Information Systems & BSc (Hons) Software Engineering Cohort: BCA/07B/PT - BCA/06/PT - BCNS/06/FT

More information

Java Interfaces. Recall: A List Interface. Another Java Interface Example. Interface Notes. Why an interface construct? Interfaces & Java Types

Java Interfaces. Recall: A List Interface. Another Java Interface Example. Interface Notes. Why an interface construct? Interfaces & Java Types Interfaces & Java Types Lecture 10 CS211 Fall 2005 Java Interfaces So far, we have mostly talked about interfaces informally, in the English sense of the word An interface describes how a client interacts

More information

CS193j, Stanford Handout #10 OOP 3

CS193j, Stanford Handout #10 OOP 3 CS193j, Stanford Handout #10 Summer, 2003 Manu Kumar OOP 3 Abstract Superclass Factor Common Code Up Several related classes with overlapping code Factor common code up into a common superclass Examples

More information

KITES TECHNOLOGY COURSE MODULE (C, C++, DS)

KITES TECHNOLOGY COURSE MODULE (C, C++, DS) KITES TECHNOLOGY 360 Degree Solution www.kitestechnology.com/academy.php info@kitestechnology.com technologykites@gmail.com Contact: - 8961334776 9433759247 9830639522.NET JAVA WEB DESIGN PHP SQL, PL/SQL

More information

D06 PROGRAMMING with JAVA

D06 PROGRAMMING with JAVA Cicles Formatius de Grau Superior Desenvolupament d Aplicacions Informàtiques D06 PROGRAMMING with JAVA Ch13 Inheritance PowerPoint presentation, created by Angel A. Juan - ajuanp(@)gmail.com, for accompanying

More information

Object-Oriented Design Lecture 4 CSU 370 Fall 2007 (Pucella) Tuesday, Sep 18, 2007

Object-Oriented Design Lecture 4 CSU 370 Fall 2007 (Pucella) Tuesday, Sep 18, 2007 Object-Oriented Design Lecture 4 CSU 370 Fall 2007 (Pucella) Tuesday, Sep 18, 2007 The Java Type System By now, you have seen a fair amount of Java. Time to study in more depth the foundations of the language,

More information

Building Java Programs

Building Java Programs Building Java Programs Chapter 9 Lecture 9-1: Inheritance reading: 9.1 The software crisis software engineering: The practice of developing, designing, documenting, testing large computer programs. Large-scale

More information

Inheritance in Programming Languages

Inheritance in Programming Languages Inheritance in Programming Languages Krishnaprasad Thirunarayan Metadata and Languages Laboratory Department of Computer Science and Engineering Wright State University Dayton, OH-45435 INTRODUCTION Inheritance

More information

Implementation Aspects of OO-Languages

Implementation Aspects of OO-Languages 1 Implementation Aspects of OO-Languages Allocation of space for data members: The space for data members is laid out the same way it is done for structures in C or other languages. Specifically: The data

More information

Module 7. Polymorphism, Abstract Classes, and Interfaces. Adapted from Absolute Java, Rose Williams, Binghamton University

Module 7. Polymorphism, Abstract Classes, and Interfaces. Adapted from Absolute Java, Rose Williams, Binghamton University Module 7 Polymorphism, Abstract Classes, and Interfaces Adapted from Absolute Java, Rose Williams, Binghamton University Introduction to Polymorphism There are three main programming mechanisms that constitute

More information

Glossary of Object Oriented Terms

Glossary of Object Oriented Terms Appendix E Glossary of Object Oriented Terms abstract class: A class primarily intended to define an instance, but can not be instantiated without additional methods. abstract data type: An abstraction

More information

The Java Series. Java Essentials I What is Java? Basic Language Constructs. Java Essentials I. What is Java?. Basic Language Constructs Slide 1

The Java Series. Java Essentials I What is Java? Basic Language Constructs. Java Essentials I. What is Java?. Basic Language Constructs Slide 1 The Java Series Java Essentials I What is Java? Basic Language Constructs Slide 1 What is Java? A general purpose Object Oriented programming language. Created by Sun Microsystems. It s a general purpose

More information

Handout 1. Introduction to Java programming language. Java primitive types and operations. Reading keyboard Input using class Scanner.

Handout 1. Introduction to Java programming language. Java primitive types and operations. Reading keyboard Input using class Scanner. Handout 1 CS603 Object-Oriented Programming Fall 15 Page 1 of 11 Handout 1 Introduction to Java programming language. Java primitive types and operations. Reading keyboard Input using class Scanner. Java

More information

Java Memory Management

Java Memory Management Java Memory Management 1 Tracing program execution Trace: To follow the course or trail of. When you need to find and fix a bug or have to understand a tricky piece of code that your coworker wrote, you

More information

Introduction to Object-Oriented Programming

Introduction to Object-Oriented Programming Introduction to Object-Oriented Programming Objects and classes Abstract Data Types (ADT) Encapsulation and information hiding Aggregation Inheritance and polymorphism OOP: Introduction 1 Pure Object-Oriented

More information

D06 PROGRAMMING with JAVA

D06 PROGRAMMING with JAVA Cicles Formatius de Grau Superior Desenvolupament d Aplicacions Informàtiques D06 PROGRAMMING with JAVA Ch11 Interfaces & Polymorphism PowerPoint presentation, created by Angel A. Juan - ajuanp(@)gmail.com,

More information

JAVA - INHERITANCE. extends is the keyword used to inherit the properties of a class. Below given is the syntax of extends keyword.

JAVA - INHERITANCE. extends is the keyword used to inherit the properties of a class. Below given is the syntax of extends keyword. http://www.tutorialspoint.com/java/java_inheritance.htm JAVA - INHERITANCE Copyright tutorialspoint.com Inheritance can be defined as the process where one class acquires the properties methodsandfields

More information

Chapter 13 - Inheritance

Chapter 13 - Inheritance Goals Chapter 13 - Inheritance To learn about inheritance To understand how to inherit and override superclass methods To be able to invoke superclass constructors To learn about protected and package

More information

SL-110: Fundamentals of Java Revision 15 October Sun Educational Services Instructor-Led Course Description

SL-110: Fundamentals of Java Revision 15 October Sun Educational Services Instructor-Led Course Description Sun Educational Services Instructor-Led Course Description Fundamentals of Java SL-110 The Fundamentals of the Java course provides students, with little or no programming experience, with the basics of

More information

Java 101 primer: Composition and inheritance. Use composition to overcome the problem with inheritance

Java 101 primer: Composition and inheritance. Use composition to overcome the problem with inheritance Java 101 primer: Composition and inheritance Use composition to overcome the problem with inheritance BY JEFF FRIESEN, JAVAWORLD, OCTOBER 2015 In Java 101: Inheritance in Java, Part 1, you learned how

More information

1. Polymorphism in C++...2

1. Polymorphism in C++...2 1. Polymorphism in C++...2 1.1 Polymorphism and virtual functions... 2 1.2 Function call binding... 3 1.3 Virtual functions... 4 1.4 How C++ implements late binding... 6 1.4.1 Why do I have to know at

More information

1) Which of the following is a constant, according to Java naming conventions? a. PI b. Test c. x d. radius

1) Which of the following is a constant, according to Java naming conventions? a. PI b. Test c. x d. radius Programming Concepts Practice Test 1 1) Which of the following is a constant, according to Java naming conventions? a. PI b. Test c. x d. radius 2) Consider the following statement: System.out.println("1

More information

Introduction to Programming Block Tutorial C/C++

Introduction to Programming Block Tutorial C/C++ Michael Bader Master s Program Computational Science and Engineering C/C++ Tutorial Overview From Maple to C Variables, Operators, Statements Functions: declaration, definition, parameters Arrays and Pointers

More information

Exception Handling. Overloaded methods Interfaces Inheritance hierarchies Constructors. OOP: Exception Handling 1

Exception Handling. Overloaded methods Interfaces Inheritance hierarchies Constructors. OOP: Exception Handling 1 Exception Handling Error handling in general Java's exception handling mechanism The catch-or-specify priciple Checked and unchecked exceptions Exceptions impact/usage Overloaded methods Interfaces Inheritance

More information

Checking Access to Protected Members in the Java Virtual Machine

Checking Access to Protected Members in the Java Virtual Machine Checking Access to Protected Members in the Java Virtual Machine Alessandro Coglio Kestrel Institute 3260 Hillview Avenue, Palo Alto, CA 94304, USA Ph. +1-650-493-6871 Fax +1-650-424-1807 http://www.kestrel.edu/

More information

Abstract. a http://www.eiffel.com

Abstract. a http://www.eiffel.com Abstract Eiffel Software a provides a compiler for the Eiffel programming language capable of generating C code or Common Intermediate Language byte code. The CLI code can be executed on the Common Language

More information

Classes and Objects in Java Constructors. In creating objects of the type Fraction, we have used statements similar to the following:

Classes and Objects in Java Constructors. In creating objects of the type Fraction, we have used statements similar to the following: In creating objects of the type, we have used statements similar to the following: f = new (); The parentheses in the expression () makes it look like a method, yet we never created such a method in our

More information

Projet Java. Responsables: Ocan Sankur, Guillaume Scerri (LSV, ENS Cachan)

Projet Java. Responsables: Ocan Sankur, Guillaume Scerri (LSV, ENS Cachan) Projet Java Responsables: Ocan Sankur, Guillaume Scerri (LSV, ENS Cachan) Objectives - Apprendre à programmer en Java - Travailler à plusieurs sur un gros projet qui a plusieurs aspects: graphisme, interface

More information

Java Programming Language

Java Programming Language Lecture 1 Part II Java Programming Language Additional Features and Constructs Topics in Quantitative Finance: Numerical Solutions of Partial Differential Equations Instructor: Iraj Kani Subclasses and

More information

C++ Programming Language

C++ Programming Language C++ Programming Language Lecturer: Yuri Nefedov 7th and 8th semesters Lectures: 34 hours (7th semester); 32 hours (8th semester). Seminars: 34 hours (7th semester); 32 hours (8th semester). Course abstract

More information

Practical Programming Methodology. Michael Buro. Class Inheritance (CMPUT-201)

Practical Programming Methodology. Michael Buro. Class Inheritance (CMPUT-201) Practical Programming Methodology (CMPUT-201) Lecture 16 Michael Buro C++ Class Inheritance Assignments ctor, dtor, cctor, assignment op. and Inheritance Virtual Functions Class Inheritance Object Oriented

More information

ATM Case Study OBJECTIVES. 2005 Pearson Education, Inc. All rights reserved. 2005 Pearson Education, Inc. All rights reserved.

ATM Case Study OBJECTIVES. 2005 Pearson Education, Inc. All rights reserved. 2005 Pearson Education, Inc. All rights reserved. 1 ATM Case Study 2 OBJECTIVES.. 3 2 Requirements 2.9 (Optional) Software Engineering Case Study: Examining the Requirements Document 4 Object-oriented design (OOD) process using UML Chapters 3 to 8, 10

More information

CS170 Lab 11 Abstract Data Types & Objects

CS170 Lab 11 Abstract Data Types & Objects CS170 Lab 11 Abstract Data Types & Objects Introduction: Abstract Data Type (ADT) An abstract data type is commonly known as a class of objects An abstract data type in a program is used to represent (the

More information

Object Oriented Software Design

Object Oriented Software Design Object Oriented Software Design Polymorphism, Abstract Classes, Interfaces Giuseppe Lipari http://retis.sssup.it/~lipari Scuola Superiore Sant Anna Pisa October 3, 2011 G. Lipari (Scuola Superiore Sant

More information

Topics. Introduction. Java History CS 146. Introduction to Programming and Algorithms Module 1. Module Objectives

Topics. Introduction. Java History CS 146. Introduction to Programming and Algorithms Module 1. Module Objectives Introduction to Programming and Algorithms Module 1 CS 146 Sam Houston State University Dr. Tim McGuire Module Objectives To understand: the necessity of programming, differences between hardware and software,

More information

More on Objects and Classes

More on Objects and Classes Software and Programming I More on Objects and Classes Roman Kontchakov Birkbeck, University of London Outline Object References Class Variables and Methods Packages Testing a Class Discovering Classes

More information

Programming Languages Featherweight Java David Walker

Programming Languages Featherweight Java David Walker Programming Languages Featherweight Java David Walker Overview Featherweight Java (FJ), a minimal Javalike language. Models inheritance and subtyping. Immutable objects: no mutation of fields. Trivialized

More information

Java Crash Course Part I

Java Crash Course Part I Java Crash Course Part I School of Business and Economics Institute of Information Systems HU-Berlin WS 2005 Sebastian Kolbe skolbe@wiwi.hu-berlin.de Overview (Short) introduction to the environment Linux

More information

Crash Course in Java

Crash Course in Java Crash Course in Java Based on notes from D. Hollinger Based in part on notes from J.J. Johns also: Java in a Nutshell Java Network Programming and Distributed Computing Netprog 2002 Java Intro 1 What is

More information

3 Pillars of Object-oriented Programming. Industrial Programming Systems Programming & Scripting. Extending the Example.

3 Pillars of Object-oriented Programming. Industrial Programming Systems Programming & Scripting. Extending the Example. Industrial Programming Systems Programming & Scripting Lecture 12: C# Revision 3 Pillars of Object-oriented Programming Encapsulation: each class should be selfcontained to localise changes. Realised through

More information

CSE 1020 Introduction to Computer Science I A sample nal exam

CSE 1020 Introduction to Computer Science I A sample nal exam 1 1 (8 marks) CSE 1020 Introduction to Computer Science I A sample nal exam For each of the following pairs of objects, determine whether they are related by aggregation or inheritance. Explain your answers.

More information

GUJARAT TECHNOLOGICAL UNIVERSITY, AHMEDABAD, GUJARAT COURSE CURRICULUM COURSE TITLE: JAVA PROGRAMMING (COURSE CODE: )

GUJARAT TECHNOLOGICAL UNIVERSITY, AHMEDABAD, GUJARAT COURSE CURRICULUM COURSE TITLE: JAVA PROGRAMMING (COURSE CODE: ) GUJARAT TECHNOLOGICAL UNIVERSITY, AHMEDABAD, GUJARAT COURSE CURRICULUM COURSE TITLE: JAVA PROGRAMMING (COURSE CODE: 3350703) Diploma Programme in which this course is offered Computer Engineering/ Information

More information

Course: Introduction to Java Using Eclipse Training

Course: Introduction to Java Using Eclipse Training Course: Introduction to Java Using Eclipse Training Course Length: Duration: 5 days Course Code: WA1278 DESCRIPTION: This course introduces the Java programming language and how to develop Java applications

More information

Course Number: IAC-SOFT-WDAD Web Design and Application Development

Course Number: IAC-SOFT-WDAD Web Design and Application Development Course Number: IAC-SOFT-WDAD Web Design and Application Development Session 1 (10 Hours) Client Side Scripting Session 2 (10 Hours) Server Side Scripting - I Session 3 (10 hours) Database Session 4 (10

More information

DIPLOMADO DE JAVA - OCA

DIPLOMADO DE JAVA - OCA DIPLOMADO DE JAVA - OCA TABLA DE CONTENIDO INTRODUCCION... 3 ESTRUCTURA DEL DIPLOMADO... 4 Nivel I:... 4 Fundamentals of the Java Programming Language Java SE 7... 4 Introducing the Java Technology...

More information

Overview. Game Programming in C++ Inheritance. Inheritance. Inheritance. Inheritance. Inheritance. Polymorphism

Overview. Game Programming in C++ Inheritance. Inheritance. Inheritance. Inheritance. Inheritance. Polymorphism Overview Game Programming in C++ Arjan Egges Lecture #4: Advanced OO programming Overview, examples When (not) to use it Polymorphism Virtual members Abstract base classes Problems with multiple inheritance

More information

Object Oriented Software Design

Object Oriented Software Design Object Oriented Software Design Introduction to Java - II Giuseppe Lipari http://retis.sssup.it/~lipari Scuola Superiore Sant Anna Pisa October 28, 2010 G. Lipari (Scuola Superiore Sant Anna) Introduction

More information

Grundlæggende Programmering IT-C, Forår 2001. Written exam in Introductory Programming

Grundlæggende Programmering IT-C, Forår 2001. Written exam in Introductory Programming Written exam in Introductory Programming IT University of Copenhagen, June 11, 2001 English version All materials are permitted during the exam, except computers. The exam questions must be answered in

More information

Konzepte objektorientierter Programmierung

Konzepte objektorientierter Programmierung Konzepte objektorientierter Programmierung Prof. Dr. Peter Müller Werner Dietl Software Component Technology Exercises 3: Some More OO Languages Wintersemester 04/05 Agenda for Today 2 Homework Finish

More information

Object-Oriented Programming in Java

Object-Oriented Programming in Java Object-Oriented Programming in Java Quiz 1 Jan 10, 2001 Problem 1: Who wants to be a Java developer? (with apologies to Regis) Fill in your answer in the space provided. Question 1: Which is these word-pairs

More information

Getting Started with the Internet Communications Engine

Getting Started with the Internet Communications Engine Getting Started with the Internet Communications Engine David Vriezen April 7, 2014 Contents 1 Introduction 2 2 About Ice 2 2.1 Proxies................................. 2 3 Setting Up ICE 2 4 Slices 2

More information

Compile-time type versus run-time type. Consider the parameter to this function:

Compile-time type versus run-time type. Consider the parameter to this function: CS107L Handout 07 Autumn 2007 November 16, 2007 Advanced Inheritance and Virtual Methods Employee.h class Employee public: Employee(const string& name, double attitude, double wage); virtual ~Employee();

More information

Programmation 2. Introduction à la programmation Java

Programmation 2. Introduction à la programmation Java Programmation 2 Introduction à la programmation Java 1 Course information CM: 6 x 2 hours TP: 6 x 2 hours CM: Alexandru Costan alexandru.costan at inria.fr TP: Vincent Laporte vincent.laporte at irisa.fr

More information

Java Cheatsheet. http://introcs.cs.princeton.edu/java/11cheatsheet/ Tim Coppieters Laure Philips Elisa Gonzalez Boix

Java Cheatsheet. http://introcs.cs.princeton.edu/java/11cheatsheet/ Tim Coppieters Laure Philips Elisa Gonzalez Boix Java Cheatsheet http://introcs.cs.princeton.edu/java/11cheatsheet/ Tim Coppieters Laure Philips Elisa Gonzalez Boix Hello World bestand genaamd HelloWorld.java naam klasse main methode public class HelloWorld

More information

MAHALAKSHMI ENGINEERING COLLEGE B TIRUCHIRAPALLI 621213

MAHALAKSHMI ENGINEERING COLLEGE B TIRUCHIRAPALLI 621213 MAHALAKSHMI ENGINEERING COLLEGE B TIRUCHIRAPALLI 621213 DEPARTMENT OF COMPUTER SCIENCE AND ENGINEERING Sub code: CS2203 SEM: III Sub Name: Object Oriented Programming Year: II UNIT-IV PART-A 1. Write the

More information

Introduction: Abstract Data Types and Java Review

Introduction: Abstract Data Types and Java Review Introduction: Abstract Data Types and Java Review Computer Science E-119 Harvard Extension School Fall 2012 David G. Sullivan, Ph.D. Welcome to Computer Science E-119! We will study fundamental data structures.

More information

PHP Object Oriented Classes and objects

PHP Object Oriented Classes and objects Web Development II Department of Software and Computing Systems PHP Object Oriented Classes and objects Sergio Luján Mora Jaume Aragonés Ferrero Department of Software and Computing Systems DLSI - Universidad

More information

Object Oriented Software Design

Object Oriented Software Design Object Oriented Software Design Introduction to Java - II Giuseppe Lipari http://retis.sssup.it/~lipari Scuola Superiore Sant Anna Pisa September 14, 2011 G. Lipari (Scuola Superiore Sant Anna) Introduction

More information

Sample CSE8A midterm Multiple Choice (circle one)

Sample CSE8A midterm Multiple Choice (circle one) Sample midterm Multiple Choice (circle one) (2 pts) Evaluate the following Boolean expressions and indicate whether short-circuiting happened during evaluation: Assume variables with the following names

More information

Multiple Dispatching. Alex Tritthart WS 12/13

Multiple Dispatching. Alex Tritthart WS 12/13 Multiple Dispatching Alex Tritthart WS 12/13 Outline 1 Introduction 2 Dynamic Dispatch Single Dispatch Double Dispatch 3 Multiple Dispatch Example 4 Evaluation 2 / 24 What is it all about? Introduction

More information